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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Image maps</title>
<script type="text/javascript">

	function writeText(text) {
		
		document.getElementById("desc").innerHTML = text;
	}
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<img src="./images/eg_planets.jpg" width="145" height="126" alt="Planet" usemap="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords ="0,0,82,126"
onMouseOver="writeText('The Sun and the gas giant planets like Jupiter are by far the largest objects in our Solar System.')"
href ="sun.htm" target ="_blank" alt="Sun" />

<area shape ="circle" coords ="90,58,3"
onMouseOver="writeText('The planet Mercury is very difficult to study from the Earth because it is always so close to the Sun.')"
href ="mercur.htm" target ="_blank" alt="Mercury" />

<area shape ="circle" coords ="124,58,8"
onMouseOver="writeText('Until the 1960s, Venus was often considered a twin sister to the Earth because Venus is the nearest planet to us, and because the two planets seem to share many characteristics.')"
href ="venus.htm" target ="_blank" alt="Venus" />
</map> 

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<p id="desc"></p>

</body>
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